Biota of freshwater ecosystems
Subtitle: identification manual.
Contributors: Kenk, Roman, 1898-; Cressey, Roger F., 1930-; Burch, J. B. 1929-; Foster, Nancy; Holsinger, John R.; Brown, Harley P.; Williams, W. D.; Klemm, Donald J.; Hobbs, H. H.; Ferris, V. R.; Tjepkema, J. P.; Ferris, J. M.; Burch, J. B. 1929-; United States. Environmental Protection Agency; Oceanography and Limnology Program (Smithsonian Institution)
Series: Water pollution control research series
Publisher: U.S. Environmental Protection Agency; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1972
Place of publication: Washington, D.C
Language: eng
Subjects: Freshwater animals -- North America -- Identification.; Freshwater invertebrates -- North America -- Identification.
Notes: "Project no. 18050 ELD; contract no. 14-12-894."

"For the Environmental Protection Agency."

Prepared by the Oceanography and Limnology Program, Smithsonian Institution.

Includes indexes.

Includes bibliographies.
Table of contents: value: no. 1. Freshwater planarians (Turbellaria) of North America; value: no. 2. The genus Argulus (Crustacea: Branchiura) of the United States; value: no. 3. Freshwater sphaeriacean clams (Mollusca: Pelecypoda) of North America; value: no. 4. Freshwater polychaetes (Annelida) of North America; value: no. 5. The freshwater amphipod crustaceans (Gammaridae) of North America; value: no. 6. Aquatic dryopoid beetles (Coleoptera) of the United States; value: no. 7. Freshwater isopods (Asellidae) of North America; value: no. 8. Freshwater leeches (Annelida: Hirudinea) of North America; value: no. 9. Crayfishes (Astacidae) of North and Middle America; value: no. 10. Genera of freshwater nematodes (Nematoda) of eastern North America; value: no. 11. Freshwater unionacean clams (Mollusca: Pelecypoda) of North America.